Content .. 2196 2197 2198 2199 ..
Chevrolet Silverado / GMC Sierra. Manual - part 2198
Fig. 46: View Of Pushrods
Courtesy of GENERAL MOTORS CORP.
4. Install the pushrods.
IMPORTANT: Ensure the pushrods seat properly to the valve lifter sockets.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
Fig. 47: Identifying Offset Intake Rocker Arm & Non-Offset Rocker Arm
Courtesy of GENERAL MOTORS CORP.
5. Install the rocker arms and bolts.
The intake rocker arms (1) have an offset design.
IMPORTANT:
Ensure the pushrods seat properly to the ends of the
rocker arms.
DO NOT tighten the rocker arm bolts at this time.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
Fig. 48: View Of Camshaft & Crankshaft Sprocket Alignment Marks
Courtesy of GENERAL MOTORS CORP.
6. Rotate the crankshaft until number 1 piston is at top dead center of compression stroke.
In this position, cylinder number 1 rocker arms will be off lobe lift, and the crankshaft
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
sprocket key will be at the 1:30 position. The camshaft and crankshaft sprocket alignment
marks (1, 2) will be in the 12 o'clock position. If viewing from the rear of the engine, the
additional crankshaft pilot hole, non-threaded, will be in the 10:30 position.
The engine firing order is 1, 8, 7, 2, 6, 5, 4, 3.
Cylinders 1, 3, 5 and 7 are left bank.
Cylinders 2, 4, 6, and 8 are right bank.
7. With the engine in the number 1 firing position, tighten the following valve rocker arm
bolts:
Tighten:
Tighten the exhaust valve rocker arm bolts 1, 2, 7, and 8 to 30 N.m (22 lb ft).
Tighten the intake valve rocker arm bolts 1, 3, 4, and 5 to 30 N.m (22 lb ft).
8. Rotate the crankshaft 360 degrees.
9. Tighten the following valve rocker arm bolts:
Tighten:
Tighten the exhaust valve rocker arm bolts 3, 4, 5, and 6 to 30 N.m (22 lb ft).
Tighten the intake valve rocker arm bolts 2, 6, 7, and 8 to 30 N.m (22 lb ft).
VALVE ROCKER ARM COVER INSTALLATION - LEFT SIDE
NOTE:
Refer to Fastener Notice .
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
Content .. 2196 2197 2198 2199 ..